Originally Posted by wrapperman
I have the same issue with my 378. I can't find where that cable connection to the left of the door goes to. When I get my coach back later this weekend I will do a signal search and find out where it goes and post it. I just hook up cable to the back connection in the compartment top where the converter is located.
I am thinking it is for an outside TV hookup since there is a 110 v outlet
The switch in the upper cabinet has a position for cable, satellite and outside antenna.
I have read that there is a connection on the roof for a satellite antenna but haven't noticed one up there.
Too bad Forrest River doesn't do a better job at documentation of components and accessories.
I did add a satellite antenna and a HD wireless transmitter to both TVs so I rarely use the R56 wires that are installed in the motorhome.
I saw a sketch furnished by FR awhile back showing all the coax runs for the 378. I had trouble with the outside hookup and traced all the wires to cure it. It turned out to be a bad TV. Meanwhile the cable conn in the basment is feed to an outside TV, it originates at a splitter for the front TV to rear TV then split again fo the outside outlet. I'm certain the first split is in the void behind the DVD cab. Remove the coax amp and AC outlet and pull up the multi cables, splitter is attached. Cannot recall where the bedroom/outside splitter is, but now you know it exists. With healthy TV set, it worked fine.
Check with Iggy, i believe he posted the sketch, a couple years ago. I received it with the new unit books but since have lost it. I remember, the provided splitters are not suitable for satellite signals.